Need some help with phrases please

I'm unsure how to say and pronounce some Japanese phrases and words:

Inochi Futatsu No Naka Ni Ikitaru Sakura Kana

hikikormori

Ichi go ichi e

Zuishonishutonare (I don't know how to break this up into individual words)

Thank you!

It's "hikikomori".

The breakdown would be: zuisho ni shu to nare

As for pronunciation, the online dictionary WWWJDIC has pronunciation samples for many words. Give it a try. Search for a word, then click on the small blue arrow next to the search result. You might have to turn on Flash for the button to show.

For reference your phrases in Kanji/Kana script:
命二つの中に生きたる桜哉
いのちふたつのなかにいきたるさくらかな

引きこもり
ひきこもり

一期一会
いちごいちえ

随所に主となれ
ずいしょにしゅとなれ

That's absolutely amazing and so helpful. Thank you!